-.TH WIMUPDATE "1" "July 2017" "wimlib 1.12.0" "User Commands"
+.TH WIMUPDATE "1" "September 2022" "wimlib 1.13.6" "User Commands"
.SH NAME
wimupdate \- Update a WIM image
.SH SYNOPSIS
This is efficient, but in general this option should \fInot\fR be used because a
failed or interrupted compaction will corrupt the WIM archive. For more
information, see the documentation for this option in \fBwimoptimize\fR(1).
+.TP
+\fB--ref\fR="\fIGLOB\fR"
+File glob of WIM(s) on which the delta WIM is based. Updating split WIMs is not
+allowed, but updating delta WIMs is allowed. When updating a delta WIM, the
+WIM(s) on which the delta WIM is based should be specified using this option.
+(It isn't a hard requirement, but it's needed for data deduplication to work
+fully and for the TOTALBYTES statistic to be correctly updated.)
.SH NOTES
\fBwimupdate\fR can be viewed as redundant with \fBwimmountrw\fR, since a WIM
image can also be updated by mounting it read-write. However, \fBwimupdate\fR
.PP
Add some files and directories to a WIM image. Note that the first path of each
\fBadd\fR command specifies the files to add, while the second path of each
-\fBadd\fR command specify the locations at which to to add them inside the WIM
+\fBadd\fR command specify the locations at which to add them inside the WIM
image:
.PP
.RS